157037805217 has 4 divisors (see below), whose sum is σ = 165302952880. Its totient is φ = 148772657556.

The previous prime is 157037805187. The next prime is 157037805229. The reversal of 157037805217 is 712508730751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712508730751 = 37 ⋅19256992723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157037805217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157037805317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4132573803 + ... + 4132573840.

It is an arithmetic number, because the mean of its divisors is an integer number (41325738220).

Almost surely, 2^157037805217 is an apocalyptic number.

It is an amenable number.

157037805217 is a deficient number, since it is larger than the sum of its proper divisors (8265147663).

157037805217 is an equidigital number, since it uses as much as digits as its factorization.

157037805217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265147662.

The product of its (nonzero) digits is 411600, while the sum is 46.

The spelling of 157037805217 in words is "one hundred fifty-seven billion, thirty-seven million, eight hundred five thousand, two hundred seventeen".